Centrifugal separator



Dec. 25 193;

G. C. BARNES ET AL,

CENTRIFUGAL SEPARATOR Filed Jan. '20. 1921 Sheets-Shadi 1\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\W\ l Mm. v

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CENTRIFUGAL sEPARAToR Filed Jan. 20. 1921 4 Sheets-Sheet 2 A/ v F/v raf?s;

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Patentlfec. 25, i923," i

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:l AND JAMS ROBERTS MORGAN, OF COOGEE, NEW' SOUTH WALES, AUSTRALIIIA.

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Application filed January 20, 1921. y Serial Ifo. 438,537.

To all whom t may concern: l* ABe it known that we, GERARD CHARLESBARNES and JAMES ROBERTS MORGAN', subjects o'f the King of Great Britain-and Irelandyresiding at Taormina, Coogee, in the State ofsNew SouthWales, Commonwealth of Australia, and VVarilda,Coo gee, in the State ofNew South Wales, Commonwealth of) Australia, respectively, have inventednew and useful Improvements in Centrifugal Separators, of which thefollowing is a specification. y This invention relates particularly tocentrifugal separators for the treatment of sugar, grain, coal,/v water,sewage, and other substances for `the purpose of separating the li uidor semiwliquid constituents from the so id constituents or forseparating solid material into grades of different sizes. The objectofthis mvention is to provide a centrifugal separator, for the purposesset forth, that may be worked continuously, that is simple inconstruction and is efcient in operation.. And this invention relatesparticularly to centrifugal separators with a horizontal axis supportinga rotating spiral or helix and a rotating filter basket or cas-k ingsurrounding said spiral or helix. These improvements comprise (a)differentially rotatingfthe spiral and the casing'from one drivingz ointand means for effecting the same (b feeding the materialr to be treatedinto the machine through a hollow central axis; Y(c) means whereby theoint of entry .of the material to be treated) may be adjusted; (d)improved means for, if necessary, washing'anddrying the material undertreatment; (e) an improved construction of filter basket or screen, and(f) the combination vof the parts set forth with the other parts of` themachine and with each But in order that the invention may be Jreadilyunderstood it ,will now be described with reference to the drawingsaccompany-.ly

ing and forming-part of this specification in which is illustrated aseparator adapted for the treatment o f sugar or the like.

Fig. 1 is a longitudinal section of a centrifugal separator embodyingthese improvements.

`Figs.2, B and`4are transverse sections, on lines a-a, bb, and c-crespectively of Fi l. Fig.n 2a is a detail view of the joint between amain frame member and segmental frames. l

Figs. 5 and 6 are a detail side sectional elevation and underneath plan,respectivel on an' enlarged scale, showlng means for a justingthe pointof entry of the material being fed into the machine.. Fig. Z is asectional plan showing an arrangement of pipes forl water and air.

Fig. 8 is a perspective view of portion of the main frame of the basket,and

Fig. 9 is a perspectiveview of a removable segment` of` the frame of thebasket.

The centrifugal separator has a fixed hollow shaft 10 carriedby"standards 11. End discs 12-13 having'bosses 121-13a respec- -tivelyarefcarried by and run freely upon bearings 11i.

yIntermediate the discs 12-13 are screw threaded stay rods or braces 15upon which are clamp nuts 16 to secure the blades of a spiral orhelix17,the spiral being preferable in order that the travel of the materialbeing treated may be assisted and regulated according to the incline ofthe cone of the basket. rlhe boss13a of the disc 13 is integral with abox casing or extension 18 that surrounds the adjacent end of the hollowshaft, the casing running on a bearing 18B. A portion of the exteriorofthe vcasing 18, carries or is shaped as a pulley 19 for drivingpurposes. Outside the discsA 12-13 are other similar discs 20'-21 thebosses 20el and 21t1 of which run freely upon bearings about the bosses12a and 13 respectively. The vdiscs 20-21 are connected b y longitudinalframe bars 22 that are provided witjh flanges 22a tohform seatin s forsegmental frames-23 which, when assembled, constitute the basket orscreen. Theseg` ments23 are secured imposition in any ap propriatemanner. Gauze or nettingV or otherfiltering or grading material 24 ofsuitable mesh lies against the -inner faces of the segmental frames 23and is'secured in position byl being clamped between said `frames andthe frame bars 22. The gauze 24 will not extend to the end of the casingbut will be stopped short so -as to provide' I a way for the freepassage of the separated\- or the treated material. l A

Fast upon the shaft 1'0 within the box .casing 18 is a gear wheel 26 inmesh with another gear wheel -27 on a spindle 28 in a bracket bearing29'carried by the casing 1 8.,

` slidable gate 41 wherebythe point f entry The box casing 18 is cutaway between the bracket bearings 29 to admit the wheel 27 which iscounterbalanced by the weight 30. Fast on the spindle 28 is a worin 3lin. mesh with `a worm wheel 32 on a spindle 33 carried 'in bearing 34which is an extension of one of the bracket bearings 29. Fast upon thespindle 33 is a bevel pinion 35 in mesh with a crown wheel 36 integralwiththe boss of the frame 21.

At the forward end of the hollow shaft- 10 is a hopper`37- in the bottomof which is a feed screw `38'mounted on a spindle 39 and adapted tobedriven by a 4pulley 40.

the forward end is cut away as at 42 to form a feed opening which isprovided with a of the material that is being fed through the feedopening 4 2 may be adjusted. The under face of this gate 41 is providedwith a rack-43 that meshes with a pinion 44 yon a spindle 45 which maybe manipulated by a knurled head 46, thus enlarging or diminishin thearea of the feed opening 42.

ithin the iixedfshaft 10 are two pipes 47 and 48 connectedwith sourcesof supply at the discharge end of the apparatus. The pipe 47 is incommunication with say water or other liquid supply and intermediate theends of the frame connects with a pipe 49 outside 'the tubular axis,lthepipe 49 being perforated to form a spray. The pipe 48 connects withsay a compressed air reservoir or steam supply or the like and, nearerthe discharge end ofl the separator than the pipe 49 it is connected 'toa spray pipe 50.

The whole of the rotating portion of the machine is enclosed within aAcasing 51 which is suitably divided into receiving chambers or hoppersYand provided with -discharge outlets 52 and 53.

When power is applied i to the pulley 19 the spiral 17 and the casing 23will be simultaneously rotated but the casing 23 will be retarded oraccelerated by means of the gears 26-"27, worm 31, worm wheel 32, pinion35 and crown wheel. 36,thus causing a dierential movement so that thecontents of the separator are moved slowly towards Y its discharge end.l

- 2 The material to be treated is dumped into thevhopper 37 and fed bythe screw 38 to the feed o ening 42. The gate 41 is adjusted so that t ematerial will enter the machine at the desired point. When the materialpasses into'the rotating separator i't vwill be held against thefiltering or gradingl material 24 by centrifugal-force' and by -reasonof the o0di'erential movement' between the spiral 17 and 'the outercasin 23, it will be gradually movedAtoward-theA ischargeend of the maAs the material undei'g` treatment is` chine. vfed toward the dischargeend, it may be washed by a spray from the pipe 49 the The bottom portionof the hollow axisxat liquid passing through the gauze 24 and outlet 52;it'mayl then be dried by means of an air blast from the pipe 50 ntil theproduct is discharged and passes tlirough outlet 53 into suitablereceptacles. We claim 1. In acentrifugal separator, the combination of avfixed shaft, a frame mounted for .rotation on said shaft and carrying ahelix, a casing mouiited'for rotation onsaid frame, said frame having ahollow extension projecting longitudinally from one end thereof helix, acasin mounted for rotationon saidv frame, said rame having a hollowextension projecting longitudinally from one end `thereof and providedwith meansfor receivin'g rotar motion,a gear wheel secured to said shat, a spindle supported ,from said extension and carrying a gear wheel inmesh with said 4first gear wheel, a worm on said spindle, a wormWheel`suppor'ted by said extension in mesh withl said worm, a crownwheel integral with the casing, and a pinion for imparting motion fromsaid worm wheel to said crown wheel. v

.3. In a centrifugal'separator, the combination of a fixedshaft, afrainemounted for rotation .on said shaft and carrying a helix, a casingmounted for rotation on said frame, said frame and casing being oflarger.diameter at one endthan at the other, said'l no from one end thereof.an, i

frame having a hollow extension projectin longitudinal y provided withmeans for receiving rotary a spindle-supported from said extension ancarrying a gear wheel in mesh with said first 'gear wheel, a worm onsaid spindle,`\a worm wheel supported by said extension in mesh withsaid worm, and gearing between said worin wheel and the casingforimparting differential moti/on to said casing and frame.

4. In a centrifu al separator, the combination of a tubular xed shaft, ahelix mounti ed for rotation .on said shaft, means for feedingmaterial'in'to said shaft, said shaft hav- 'ing an elongated 'dischargeopening rwithin said helix, a slidable gate for closin said opening, andmeans for operating sai gate.

5. In a centrifugal separator, the combinamotion, a gear wheel securedvto said shaft tion of a tubular fixed shaft, a helix inounted forrotation'o'ii said shft,vinea.ns ,for feedthereby to operaie vsai gate.

img material into sai sha, said shaft havin an elongated dischargeopening within sald helix, a siidabie ate for ciosmg said opening, saidgate being provided with a rack, a pinion in engagement with saici saofgand means for manualir iotating said pinion 6. iin a centrifugalsepaiatoi, iie combimation oi a iixed faubuiai simio, means foi 4eedingmaterial into said siiai oi e-eiil thereofsaid shaft having a diseiiargepero ing adjacent ibo said eiioi, a paie of pipes and a pair of spraypipes outsi e ofi saisi` shaft and each in communication with one .ofsaid medium-conveying pipes, saioi spray pipesbeing oeateci at differentpositions ion-l giiudiiiaiiy of said shaft., Y

lfm ihestimony whereof we have signed om mames to @his speeiiicaaon.

GERARD CHARLES BARNES JAB/EES RQBERTS MRGAN.

